<?
function highlight($text,$tag){
	return $text;
	$tags = explode(" ",$tag);
	
	foreach($tags as $tag):
		$text = preg_replace('/'.$tag.'/i', '<span class="yellow">\\0</span>', $text);
	endforeach;
    return $text;
	}
/*
function highlight($text,$tag){
	return str_ireplace($tag,'<span class="yellow">'.$tag.'</span>',$text);
	}
*/
?>